Finding the Fourth Proportional to 396,129, 546,658.92 and 226,362.72

Step by Step Solution

1. Step 1: Write the proportion equation
   396,129 : 546,658.92 = 226,362.72 : x
2. Step 2: Convert to fraction form
   396,129/546,658.92 = 226,362.72/x
3. Step 3: Cross multiply
   396,129x = 546,658.92 × 226,362.72
4. Step 4: Simplify right side
   396,129x = 123,743,200,043.46
5. Step 5: Solve for x
   x = 123,743,200,043.46/396,129
6. Step 6: Final answer
   x = 312,381.07